Cleaning up the city

摘要

London's left-wing mayor, Ken Living-stone, is proud of his green credentials. On May 30th he announced several eco-friendly changes to his London Plan, a 500-page Utopian manual that maps out the city's future over the next 20 years. He introduced new, legally binding targets for a 20% cut in carbon-dioxide emissions by 2015 (and 60% by 2050). New developments will have to get a fifth of their energy from renewable sources on the site, and small combined heat and power systems (which supply both electricity and warmth) will be preferred over traditional power plants. Even rainwater will be collected for later use.